Improvements to a Long-Wave Radiation Sensor

摘要：当前和未来的气候研究计划要求提高海气通量估算的准确性。 改进的气象测量和空气动力学体积公式使短波辐射和潜热及感热通量的净误差降低到大约+/- 10 W/ m2。长波辐射通量测量的保守误差估计与夜间的短波测量相当，但在白天，它们约为+/- 40 W/m2。因此，向下的长波辐照度是海气表面能量收支中最大的不确定性来源。 PI建议：1）设计和制造新的辐射计; 2）展示其改进的特性; 3）结合正在进行的和计划中的实地活动收集准确的下沉流长波观测; 4）鼓励海气相互作用社区使用。

Proposal #: 98-18470ABSTRACT: Current and future climate research programs are requiring increased accuracy of air-sea flux estimates. Improved meteorological measurements and aerodynamic bulk formulae have brought net error in short-wave radiation and latent and sensible heat fluxes down to approximately +/- 10 W/ m2. Conservative error estimates for long-wave radiation flux measurements are comparable to short-wave measurements at night, but during the day, they are about +/- 40 W/m2. Thus, downward long-wave irradiance is the source of the largest uncertainty in the air-sea surface energy budget. The PI's propose to 1) design and fabricate a new pyrgeometer; 2) demonstrate its improved characteristics; 3) collect accurate downwelling long-wave observations in conjunction with ongoing and planned field activities; and 4) encourage its use by the air-sea interaction community.